A lot of mascara is not vegan-friendly.Karoly Arvai/ReutersOpting for a vegan lifestyle can touch more aspects of your life than you realize. In addition to a diet free of animal byproducts, many consumers also choose to pick their toiletries, cosmetics, and other household supplies based on what is — or isn't, rather — made by testing on animals or by using animal products.

While you may think you're living "fully vegan," there are a few unlikely foods, beauty products, and more that manage to sneak in animal contents. Here are some of the culprits that don't always get the vegan stamp of approval.

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Certain beers and wines contain animal products.

While you may not have thought your alcohol of choice contained any animal products, certain brands turn to gelatin, isinglass (fish bladders), or bone marrow to filter and clarify their beverages. Thankfully, the website Barnivore is a super useful resource to show you which of your favorite booze is all-clear.

Some vitamins, supplements or prescriptions aren't vegan.

Some of your routine vitamins or supplements contain animal byproducts like milk derivatives. Prescription medication is also often tested on animals, but of course, don't let that deter you from taking the medication you need. First and foremost, listen to your doctor.

Many varieties of gum contain gelatin.

Double check your brand and flavor to make sure of their ingredients as many contain gelatin. Eclipse, Juicy Fruit, and 5 are gelatin-free, and certain flavors of Extra and Orbit are all clear, too, according to UrbanVegan.

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Some mascaras or lipsticks aren't entirely vegan.

Many brands responsible for making your lashes luscious don't get the vegan green light, but maybe not for the reason you think. It's an urban myth that mainstream mascaras contain bat guano (feces), but a derivative of fish scales is actually what's often found in your trusted tube of lipstick or mascara.